Constructional features of telephone sets

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Substation equipment, e.g. for use by subscribers > Constructional features of telephone sets

CPC:

Substation equipment, e.g. for use by subscribers (subscriber services or facilities provided at exchanges H04M3/00; prepayment telephone coin boxes H04M17/00; current supply arrangements H04M19/08) > Constructional features of telephone sets

Of 17 combined children, 11 exist in both systems.

6 codes are CPC-only extensions.

5 shared codes have differing titles between IPC and CPC.

Child Classifications

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H04M 1/0202 +7 CPC CPC only CPC only
H04M 1/0289 CPC only CPC only
H04M 1/0291 CPC only CPC only
H04M 1/0293 CPC only CPC only
H04M 1/0295 CPC only CPC only
H04M 1/0297 CPC only CPC only
H04M 1/03 Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets since 1974 +1 CPC IPC+CPC Available in IPC and CPC
H04M 1/04 Supports for telephone transmitters or receivers IPC+CPC Available in IPC and CPC
H04M 1/11 Supports for sets, e.g. incorporating armrests IPC+CPC Available in IPC and CPC
H04M 1/15 Protecting or guiding telephone cords IPC+CPC Available in IPC and CPC
H04M 1/17 Hygienic or sanitary devices on telephone equipment (for mouthpieces or earpieces H04R1/12) since 1974 IPC+CPC Available in IPC and CPC
H04M 1/18 Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment (H04M1/19 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC
H04M 1/19 Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor (circuit arrangements for preventing eavesdropping H04M1/68; telephone cabinets E04H1/14) IPC+CPC Available in IPC and CPC
H04M 1/20 Arrangements for preventing acoustic feed-back (H04M1/62 takes precedence) IPC+CPC Available in IPC and CPC
H04M 1/21 Combinations with auxiliary equipment, e.g. with clocks or memoranda pads IPC+CPC Available in IPC and CPC
H04M 1/22 Illumination; Arrangements for improving the visibility of characters on dials IPC+CPC Available in IPC and CPC
H04M 1/23 Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof (by improving visibility H04M1/22) +2 CPC IPC+CPC Available in IPC and CPC